package keye.document_manage.gui;

import java.awt.Color;
import java.awt.Component;
import java.awt.Dimension;
import java.awt.Graphics;

import javax.swing.Icon;
import javax.swing.JCheckBox;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.JTree;
import javax.swing.UIManager;
import javax.swing.plaf.ColorUIResource;
import javax.swing.tree.TreeCellRenderer;

public class CheckRenderer extends JPanel implements TreeCellRenderer {
	/**
	 * 
	 */
	private static final long serialVersionUID = 1L;
	//树的节点JPanel编辑,每个节点都是一个JPanel,JPanel中有一个JCheckBox和一个JLabel
	//TreeCellRenderer从DefaultMutableTreeNode(即CheckNode)中取得数据设置节点
	//TreeCellRenderer主要设置Tree的外观,
	protected JCheckBox check;
	protected TreeLabel label;
	
	public CheckRenderer() {
//		System.out.println("CheckRenderer");
		setLayout(null);
		add(check = new JCheckBox());
		add(label = new TreeLabel());
		check.setBackground(UIManager.getColor("Tree.textBackground"));
		label.setForeground(UIManager.getColor("Tree.textForeground"));
		
	}

	public Component getTreeCellRendererComponent(JTree tree, Object value,
			boolean isSelected, boolean expanded, boolean leaf, int row,
			boolean hasFocus) {
		String stringValue = tree.convertValueToText(value, isSelected,
				expanded, leaf, row, hasFocus);
		setEnabled(false);
		check.setSelected(((CheckNode) value).isSelected());
		label.setFont(tree.getFont());
		label.setText(stringValue);
		label.setSelected(isSelected);
		label.setFocus(hasFocus);
		if (leaf) {
			if(((CheckNode) value).getIcon()!=null){
				label.setIcon(((CheckNode) value).getIcon());
			}else{
				label.setIcon(UIManager.getIcon("Tree.leafIcon"));
			}
			
		} else if (expanded) {
			label.setIcon(UIManager.getIcon("Tree.openIcon"));
		} else {
			label.setIcon(UIManager.getIcon("Tree.closedIcon"));
		}
		return this;
	}
	//获取结点大小
	public Dimension getPreferredSize() {
		Dimension d_check = check.getPreferredSize();
		Dimension d_label = label.getPreferredSize();
		return new Dimension(d_check.width + d_label.width ,
				(d_check.height < d_label.height ? d_label.height
						: d_check.height));
	}
	//布局check和label
	public void doLayout() {
		setLayout(null);
		Dimension d_check = check.getPreferredSize();
		Dimension d_label = label.getPreferredSize();
		int y_check = 0;
		int y_label = 0;
		if (d_check.height < d_label.height) {
			y_check = (d_label.height - d_check.height) / 2;
		} else {
			y_label = (d_check.height - d_label.height) / 2;
		}
		check.setLocation(0, y_check);
		check.setBounds(0, y_check, d_check.width, d_check.height-3);
		label.setLocation(d_check.width, y_label);
		label.setBounds(d_check.width, y_label, d_label.width, d_label.height);
		
	}
	//设置背景颜色
	public void setBackground(Color color) {
		if (color instanceof ColorUIResource)
			color = null;
		super.setBackground(color);
	}

	public class TreeLabel extends JLabel {
		/**
		 * 
		 */
		private static final long serialVersionUID = 1L;
		boolean isSelected;
		boolean hasFocus;
		public TreeLabel() {
		}
		public void setBackground(Color color) {
			if (color instanceof ColorUIResource)
				color = null;
			super.setBackground(color);
		}

		public void paint(Graphics g) {
			String str;
			if ((str = getText()) != null) {
				if (0 < str.length()) {
					if (isSelected) {
						g.setColor(UIManager
								.getColor("Tree.selectionBackground"));
					} else {
						g.setColor(UIManager.getColor("Tree.textBackground"));
					}
					Dimension d = getPreferredSize();
					int imageOffset = 0;
					Icon currentI = getIcon();
					if (currentI != null) {
						imageOffset = currentI.getIconWidth()
								+ Math.max(0, getIconTextGap() - 1);
					}
					g.fillRect(imageOffset, 0, d.width - 1 - imageOffset,
							d.height);
					if (hasFocus) {
						g.setColor(UIManager
								.getColor("Tree.selectionBorderColor"));
						g.drawRect(imageOffset, 0, d.width - 1 - imageOffset,
								d.height - 1);
					}
				}
			}
			super.paint(g);
		}

		public Dimension getPreferredSize() {
			Dimension retDimension = super.getPreferredSize();
			if (retDimension != null) {
				retDimension = new Dimension(retDimension.width + 3, retDimension.height);
			}
			return retDimension;
		}

		public void setSelected(boolean isSelected) {
			this.isSelected = isSelected;
		}

		public void setFocus(boolean hasFocus) {
			this.hasFocus = hasFocus;
		}
	}
	
	public JCheckBox getCheck() {
		return check;
	}
}


